CBN Insert, 3/8" Round, 1/8" Thick, Double Sided, Edge Honed Sharp, Uncoated (CBN - Cubic Boron Nitride - SUPERABRASIVE). For engine block and head surfacing, vertical milling and Boring. CBN Insert, 1/2" Round, 3/16" Thick, Double Sided, Titanium-Nitri.
